Yes, but it seems like not all characters can be escaped like that.
If I want to browse “Heuy Lewis & the News” I need to escape the & with %26. It does not work with &
Also, I have some artists with special characters like Ã¥Ã¤Ã¶ Ã© and Ã¼. What to do with those?
This is not mentioned at all on the Firefly XML trac wiki.